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perl-5.42.2
⭐ Starred 2013 / mkppport
Security Advisories (1)
CVE-2026-8376 (2026-05-25)

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.

NAME

mkppport - distribute ppport.h among extensions

SYNOPSIS

mkppport [--list=file] [--clean]

DESCRIPTION

mkppport generates a ppport.h file using Devel::PPPort and distributes it to the various extension directories that need it to build. On certain Win32 builds, this script is not used and an alternative mechanism is used to create ppport.h.

OPTIONS

--list=file

Name of the file that holds the list of extension directories that ppport.h should be distributed to. This defaults to mkppport.lst in the same directory as this script.

--clean

Run with this option to clean out all distributed ppport.h files.

COPYRIGHT

Copyright 2006 by Marcus Holland-Moritz <mhx@cpan.org>.

This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.